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The near-UV transit of HD 189733b with the XMM-Newton optical monitor
Wheatley, Peter J.; Louden, Tom; Steinrueck, Maria E. +6 more
We present analysis of XMM-Newton optical monitor observations in the near-ultraviolet of HD 189733, covering 20 primary transits of its hot Jupiter planet. The transit is clearly detected with both the UVW2 and UVM2 filters, and our fits to the data reveal transit depths in agreement with that observed optically. The measured depths correspond to…
The New Ephemeris and Light Curve Analysis of V870 Ara by the Ground-Based and TESS Data
Davoudi, Fatemeh; Poro, Atila; Blackford, Mark G. +4 more
New CCD photometric observations and their investigation of the W UMa-type binary, V870 Ara, are presented. Light curves of the system were taken through BVIfilters from the Congarinni Observatory in Australia. The new ephemeris is calculated based on seven new determined minimum times, together with the TESS data and others compiled from the lite…
Dayside Magnetopause Processes
Fuselier, Stephen A.
A 2-d orbital period for a redback millisecond pulsar candidate in the globular cluster NGC 6397
Maccarone, Thomas J.; Heinke, Craig O.; Pichardo Marcano, Manuel +2 more
We report optical modulation of the companion to the X-ray source U18 in the globular cluster NGC 6397. U18, with combined evidence from radio and X-ray measurements, is a strong candidate as the second redback in this cluster, initially missed in pulsar searches. This object is a bright variable star with an anomalous red colour and optical varia…
Gas terminal velocity from MIRO/Rosetta data using neural network approach
Hartogh, P.; Crovisier, J.; Ip, W. H. +8 more
Context. The Microwave Instrument on the Rosetta Orbiter (MIRO) on board the Rosetta spacecraft was designed to investigate the surface and gas activity of the comet 67P/Churyumov-Gerasimenko. The MIRO spectroscopic measurements carry information about the velocity of gas emanating from the nucleus surface. Knowledge of the terminal velocity of th…
SpiKeS: Precision Warm Spitzer Photometry of the Kepler Field
Gorjian, Varoujan; Stark, Christopher C.; Lowrance, Patrick J. +11 more
The ∼200,000 targets monitored for photometric variability during the Kepler prime mission include the best-studied group of stars in the sky, due both to the extensive time history provided by Kepler and to the substantial amount of ancillary data provided by other investigators or compiled by the Kepler team. To complement this wealth of data, w…
Successive Coronal Mass Ejections Associated with Weak Solar Energetic Particle Events
Lugaz, Noé; Zhuang, Bin; Gou, Tingyu +1 more
The scenario of twin coronal mass ejections (CMEs), i.e., a fast and wide primary CME (priCME) preceded by preceding CMEs (preCMEs), has been found to be favorable to a more efficient particle acceleration in large solar energetic particle (SEP) events. Here we study 19 events during 2007-2014 associated with twin-CME eruptions but without large S…
The spectral scalings of magnetic fluctuations upstream and downstream of the Venusian bow shock
Zhang, T. L.; Chen, Y. Q.; Wang, G. Q. +2 more
We statistically investigate the spectral scalings of magnetic fluctuations at the upstream and downstream regions near the Venusian bow shock and perform a differentiation by shock geometry. Based on the Venus Express data, 115 quasi-parallel (
Correction to: SERENA: Particle Instrument Suite for Determining the Sun-Mercury Interaction from BepiColombo
Kallio, E.; Schmidt, W.; Barabash, S. +118 more
A Correction to this paper has been published: https://doi.org/10.1007/s11214-021-00809-8
Occurrence Rate of Radio-Loud and Halo CMEs in Solar Cycle 25: Prediction Using their Correlation with the Sunspot Number
Moon, Y. -J.; Pappa Kalaivani, P.; Prakash, O. +1 more
Solar coronal mass ejections (CMEs) are known for their space-weather and geomagnetic consequences. Among all CMEs, the so-called radio-loud (RL) and halo CMEs are considered the most energetic in the sense that they are usually faster and wider than the general population of CMEs. Hence the study of RL and halo CMEs has become important and the p…